Cement building-block.



PATENTBD MAY 29, 190e.

G.`W. ROBERTS. CEMENT BUILDING BLCKp* APPLICATION. FLED MAY 10.1905.

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Specification of Letters Patent.

Patented May 29, i906.

Application iled Maly 10,1905. Serial No. 259,793.

Be it known tlv i, (inonde W. ROBERTS, a citizen' oi the Uni ted States, residing at Ravenne, in the countyiot Bu'll'alo and State of Nebraska, have invented new and useful Improvements .in Cement Building-Blocks, of which the following is a specification.

ri`his invention relates to an improvement in building-blocks constructed and arranged to provide when assembled a bonded wall.

duction of a block oic hollow formation and so constructed to adapt it to interlock with the next adjacent blocks, Where/lay to provide n bonded Wall having'uninterrupted vertical air-spaces. l

A further object-oi' the invention is to so eoiuitr'uct the buildi g-block that the interlocking thereof with the contiguous blocks will provide an air-space intermediate the ends olf tin,` block.

The preferred lorin ot the invention is illustrtuted in the accompanying drawin s and will he described in detail in the fol owing specification and the novel features thereof pointed ont in the claims.

in the drawings, Figure l is a perspective view*illustrating a sec tion of e wall constructs ed et myimproved block. Fig. 2is a 'vertical oeintrai section through the well constructed of my improved "einen: is a plan of what l terni the' "wel bloc-it. Fig. 4L- is a plan of 'e single corner-bloel Fig.V 5 is eplan of a return comer-bleek.

Referring particularly to Figs. l, 2, and 3 of the drawings, wherein is clearly illustrated my improved lock constructed and arranged tor ordinary Wellsuilding purposes, it will lie noted that the bloeit comprises, preferably,

rectangular body l., which may he formed or melden tr any suitai'ile or desired mee t nel. "ilieliof stormed witlievertically @tendine ceo v nrenged openingto orovide 1 e Y 1 t 1 :u tno oloct,

he lolotlt is arranged forlmndingivith the edjaeent 'blocks lorining one end ol the bleek with u. voi i ,-"llyarranged Wedgeslniped tonguoi endthe opposite end witha wedge-shaped groove Li. The transverse d1- mension oi the tongue is approximately equal to the interior transverse dimension of the groove l, so that when the blocks are assemiiled in bondinvr relation uhe tongue ot one block Will close yi'it within the inouthof the groove of the next adjacent bleek, the inclina- "ne main object ot the invention is the pro` the neue-,i Jl-air-spece transverse of less length than the teeth ot' the'groovo,

whereby when said tongue is inserted so that the terminals of the walls of the groove, as 5, l" 'ut against the edges ol the block adjacent thev base ot the tongue, as at than air-space 7 `is formed intermediate the end of the tongue.-

and the base of the groove.

In providing a corner-block for use in aV Wall constructed of my improved bloclts'i'i have found it desirable to provide the block therefor, as 8, with one plain end 9 and the opposite formed with a groove 10, similar to the groove 4, or with a tongue similar to the tongue 3, as mey he required for the proper assembling of the corner-llilockin a series.l

` l-iliowvide for e corner-block which bonds thel .meeting ends ot afeouglef ot blocks arranged 'at right ongles, as in building side andr end Walls, I provide what l term a returnf corner-block l, comprising practically duplicates of the Wall-blocks l, formed as an integral block with the side edge of one connect-- ed to the end of the other, thus providing e vrighteangle block provided with two verti cally-arranged apertures or openings 12, the terminals of the block having the lie'reinbefore-described tongue 13 and groove i4. It is to be ,understood 'of eourse, .that the return corner-block ymay .be constructed as desired for the particular-work in hand, the respective block-sections being arranged at a rlvht anele to each other or at any angle desire.

t is to-fbe understood, of course, that the Abloeks are!v to be arranged inthe usual stag ered order-that is,'the air-space 2 of one block is arranged out of alinement with the air-space ot t ie bloeit in the course next below or above. ily providing the eiispece'? intermediate the adjacent ends of the con nected blocks l arrange a continuous airspace vertical ci' the Wall, as said air-spaces 7 in one course ot'lilock Will valine-With the eirspaces 2 of the blocks in the course immediately below and above. v

It Will be noted'that a Well constructed of in order to prevent independent movement and yet'at the seine time provideair-space intermediate the ends of adjacent blocks.

The 'blocks may lie constructed oi e. fr Suitnolo material and may be pressed or molded, rhongli l prefer the ordinary cement oone rue-tion.

Having now described. m'y invention, what elnini as new' and desire to secure by Leb lors lni ent, i5-

1. A building block comprising; a body formed with n ceni'ral verlzieully-arranged' opening, one end ol the body being formed with n dovemlod groove extending vertically thereof und of grenier width at, ita inner ond than tlie widlli ol' :mid opening, the opposite end of the body living provided with u Wedgeu shaped ril) ol' leef: length t'l'nm Llle depth of the groove, the dovwniiled groove and rib bei ing of greater extent transverse the block tlian the similar dinioi'ision of lflie vertically- .firrnnged opening, whereby to provide the .-:zmxinnini oir-aimee al the ende` of the block.

. www@ n- Wedge-shaped groove, and the terminal of the other sec/tion being forined with a wedge` shaped ril) of less length than the depth of the groove, the dovetalled groove and rib being olf gram/er extent transverse the block than the sinxilair dimension. of the vertically-arranged opening, mnxinnun airspace the ends of @he block.

la test/Qimmy whereof aiiix my signature in presence of two Witnesses.

GEORGE W. ROBERTS.

l/Vi tvnesses:

W. F. RIoHAnosoN, W. Brnooon.

whereby to provide the 

